findutils/find.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini find implementation for busybox
   4  *
   5  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
   6  *
   7  * Reworked by David Douthitt <n9ubh@callsign.net> and
   8  *  Matt Kraai <kraai@alumni.carnegiemellon.edu>.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  */
  25
  26 #include <stdio.h>
  27 #include <unistd.h>
  28 #include <dirent.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <fnmatch.h>
  32 #include <time.h>
  33 #include <ctype.h>
  34 #include "busybox.h"
  35
  36 //XXX just found out about libbb/messages.c . maybe move stuff there ? - ghoz
  37 static const char msg_req_arg[] = "option `%s' requires an argument";
  38 static const char msg_invalid_arg[] = "invalid argument `%s' to `%s'";
  39
  40 static char *pattern;
  41
  42 #ifdef CONFIG_FEATURE_FIND_TYPE
  43 static int type_mask = 0;
  44 #endif
  45
  46 #ifdef CONFIG_FEATURE_FIND_PERM
  47 static char perm_char = 0;
  48 static int perm_mask = 0;
  49 #endif
  50
  51 #ifdef CONFIG_FEATURE_FIND_MTIME
  52 static char mtime_char;
  53 static int mtime_days;
  54 #endif
  55
  56 #ifdef CONFIG_FEATURE_FIND_XDEV
  57 static dev_t *xdev_dev;
  58 static int xdev_count = 0;
  59 #endif
  60
  61 #ifdef CONFIG_FEATURE_FIND_NEWER
  62 static time_t newer_mtime;
  63 #endif
  64
  65 #ifdef CONFIG_FEATURE_FIND_INUM
  66 static ino_t inode_num;
  67 #endif
  68
  69 #ifdef CONFIG_FEATURE_FIND_EXEC
  70 static char **exec_str;
  71 static int num_matches;
  72 static int exec_opt;
  73 #endif
  74
  75 static int fileAction(const char *fileName, struct stat *statbuf, void* junk)
  76 {
  77         if (pattern != NULL) {
  78                 const char *tmp = strrchr(fileName, '/');
  79
  80                 if (tmp == NULL)
  81                         tmp = fileName;
  82                 else
  83                         tmp++;
  84                 if (!(fnmatch(pattern, tmp, FNM_PERIOD) == 0))
  85                         goto no_match;
  86         }
  87 #ifdef CONFIG_FEATURE_FIND_TYPE
  88         if (type_mask != 0) {
  89                 if (!((statbuf->st_mode & S_IFMT) == type_mask))
  90                         goto no_match;
  91         }
  92 #endif
  93 #ifdef CONFIG_FEATURE_FIND_PERM
  94         if (perm_mask != 0) {
  95                 if (!((isdigit(perm_char) && (statbuf->st_mode & 07777) == perm_mask) ||
  96                          (perm_char == '-' && (statbuf->st_mode & perm_mask) == perm_mask) ||
  97                          (perm_char == '+' && (statbuf->st_mode & perm_mask) != 0)))
  98                         goto no_match;
  99         }
 100 #endif
 101 #ifdef CONFIG_FEATURE_FIND_MTIME
 102         if (mtime_char != 0) {
 103                 time_t file_age = time(NULL) - statbuf->st_mtime;
 104                 time_t mtime_secs = mtime_days * 24 * 60 * 60;
 105                 if (!((isdigit(mtime_char) && file_age >= mtime_secs &&
 106                                                 file_age < mtime_secs + 24 * 60 * 60) ||
 107                                 (mtime_char == '+' && file_age >= mtime_secs + 24 * 60 * 60) ||
 108                                 (mtime_char == '-' && file_age < mtime_secs)))
 109                         goto no_match;
 110         }
 111 #endif
 112 #ifdef CONFIG_FEATURE_FIND_XDEV
 113         if (xdev_count) {
 114                 int i;
 115                 for (i=0; i<xdev_count; i++) {
 116                         if (xdev_dev[i] == statbuf-> st_dev)
 117                                 break;
 118                 }
 119                 if (i == xdev_count) {
 120                         if(S_ISDIR(statbuf->st_mode))
 121                                 return SKIP;
 122                         else
 123                                 goto no_match;
 124                 }
 125         }
 126 #endif
 127 #ifdef CONFIG_FEATURE_FIND_NEWER
 128         if (newer_mtime != 0) {
 129                 time_t file_age = newer_mtime - statbuf->st_mtime;
 130                 if (file_age >= 0)
 131                         goto no_match;
 132         }
 133 #endif
 134 #ifdef CONFIG_FEATURE_FIND_INUM
 135         if (inode_num != 0) {
 136                 if (!(statbuf->st_ino == inode_num))
 137                         goto no_match;
 138         }
 139 #endif
 140 #ifdef CONFIG_FEATURE_FIND_EXEC
 141         if (exec_opt) {
 142                 int i;
 143                 char *cmd_string = "";
 144                 for (i = 0; i < num_matches; i++)
 145                         cmd_string = bb_xasprintf("%s%s%s", cmd_string, exec_str[i], fileName);
 146                 cmd_string = bb_xasprintf("%s%s", cmd_string, exec_str[num_matches]);
 147                 system(cmd_string);
 148                 goto no_match;
 149         }
 150 #endif
 151
 152         puts(fileName);
 153 no_match:
 154         return (TRUE);
 155 }
 156
 157 #ifdef CONFIG_FEATURE_FIND_TYPE
 158 static int find_type(char *type)
 159 {
 160         int mask = 0;
 161
 162         switch (type[0]) {
 163                 case 'b':
 164                         mask = S_IFBLK;
 165                         break;
 166                 case 'c':
 167                         mask = S_IFCHR;
 168                         break;
 169                 case 'd':
 170                         mask = S_IFDIR;
 171                         break;
 172                 case 'p':
 173                         mask = S_IFIFO;
 174                         break;
 175                 case 'f':
 176                         mask = S_IFREG;
 177                         break;
 178                 case 'l':
 179                         mask = S_IFLNK;
 180                         break;
 181                 case 's':
 182                         mask = S_IFSOCK;
 183                         break;
 184         }
 185
 186         if (mask == 0 || type[1] != '\0')
 187                 bb_error_msg_and_die(msg_invalid_arg, type, "-type");
 188
 189         return mask;
 190 }
 191 #endif
 192
 193 int find_main(int argc, char **argv)
 194 {
 195         int dereference = FALSE;
 196         int i, firstopt, status = EXIT_SUCCESS;
 197
 198         for (firstopt = 1; firstopt < argc; firstopt++) {
 199                 if (argv[firstopt][0] == '-')
 200                         break;
 201         }
 202
 203         /* Parse any options */
 204         for (i = firstopt; i < argc; i++) {
 205                 if (strcmp(argv[i], "-follow") == 0)
 206                         dereference = TRUE;
 207                 else if (strcmp(argv[i], "-print") == 0) {
 208                         ;
 209                         }
 210                 else if (strcmp(argv[i], "-name") == 0) {
 211                         if (++i == argc)
 212                                 bb_error_msg_and_die(msg_req_arg, "-name");
 213                         pattern = argv[i];
 214 #ifdef CONFIG_FEATURE_FIND_TYPE
 215                 } else if (strcmp(argv[i], "-type") == 0) {
 216                         if (++i == argc)
 217                                 bb_error_msg_and_die(msg_req_arg, "-type");
 218                         type_mask = find_type(argv[i]);
 219 #endif
 220 #ifdef CONFIG_FEATURE_FIND_PERM
 221                 } else if (strcmp(argv[i], "-perm") == 0) {
 222                         char *end;
 223                         if (++i == argc)
 224                                 bb_error_msg_and_die(msg_req_arg, "-perm");
 225                         perm_mask = strtol(argv[i], &end, 8);
 226                         if ((end[0] != '\0') || (perm_mask > 07777))
 227                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-perm");
 228                         if ((perm_char = argv[i][0]) == '-')
 229                                 perm_mask = -perm_mask;
 230 #endif
 231 #ifdef CONFIG_FEATURE_FIND_MTIME
 232                 } else if (strcmp(argv[i], "-mtime") == 0) {
 233                         char *end;
 234                         if (++i == argc)
 235                                 bb_error_msg_and_die(msg_req_arg, "-mtime");
 236                         mtime_days = strtol(argv[i], &end, 10);
 237                         if (end[0] != '\0')
 238                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-mtime");
 239                         if ((mtime_char = argv[i][0]) == '-')
 240                                 mtime_days = -mtime_days;
 241 #endif
 242 #ifdef CONFIG_FEATURE_FIND_XDEV
 243                 } else if (strcmp(argv[i], "-xdev") == 0) {
 244                         struct stat stbuf;
 245
 246                         xdev_count = ( firstopt - 1 ) ? ( firstopt - 1 ) : 1;
 247                         xdev_dev = xmalloc ( xdev_count * sizeof( dev_t ));
 248
 249                         if ( firstopt == 1 ) {
 250                                 if ( stat ( ".", &stbuf ) < 0 )
 251                                         bb_error_msg_and_die("could not stat '.'" );
 252                                 xdev_dev [0] = stbuf. st_dev;
 253                         }
 254                         else {
 255
 256                                 for (i = 1; i < firstopt; i++) {
 257                                         if ( stat ( argv [i], &stbuf ) < 0 )
 258                                                 bb_error_msg_and_die("could not stat '%s'", argv [i] );
 259                                         xdev_dev [i-1] = stbuf. st_dev;
 260                                 }
 261                         }
 262 #endif
 263 #ifdef CONFIG_FEATURE_FIND_NEWER
 264                 } else if (strcmp(argv[i], "-newer") == 0) {
 265                         struct stat stat_newer;
 266                         if (++i == argc)
 267                                 bb_error_msg_and_die(msg_req_arg, "-newer");
 268                     if (stat (argv[i], &stat_newer) != 0)
 269                                 bb_error_msg_and_die("file %s not found", argv[i]);
 270                         newer_mtime = stat_newer.st_mtime;
 271 #endif
 272 #ifdef CONFIG_FEATURE_FIND_INUM
 273                 } else if (strcmp(argv[i], "-inum") == 0) {
 274                         char *end;
 275                         if (++i == argc)
 276                                 bb_error_msg_and_die(msg_req_arg, "-inum");
 277                         inode_num = strtol(argv[i], &end, 10);
 278                         if (end[0] != '\0')
 279                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-inum");
 280 #endif
 281 #ifdef CONFIG_FEATURE_FIND_EXEC
 282                 } else if (strcmp(argv[i], "-exec") == 0) {
 283                         int b_pos;
 284                         char *cmd_string = "";
 285
 286                         while (i++) {
 287                                 if (i == argc)
 288                                         bb_error_msg_and_die(msg_req_arg, "-exec");
 289                                 if (*argv[i] == ';')
 290                                         break;
 291                                 cmd_string = bb_xasprintf("%s %s", cmd_string, argv[i]);
 292                         }
 293
 294                         if (*cmd_string == 0)
 295                                 bb_error_msg_and_die(msg_req_arg, "-exec");
 296                         cmd_string++;
 297                         exec_str = xmalloc(sizeof(char *));
 298
 299                         while ((b_pos = strstr(cmd_string, "{}") - cmd_string), (b_pos >= 0)) {
 300                                 num_matches++;
 301                                 exec_str = xrealloc(exec_str, (num_matches + 1) * sizeof(char *));
 302                                 exec_str[num_matches - 1] = bb_xstrndup(cmd_string, b_pos);
 303                                 cmd_string += b_pos + 2;
 304                         }
 305                         exec_str[num_matches] = bb_xstrdup(cmd_string);
 306                         exec_opt = 1;
 307 #endif
 308                 } else
 309                         bb_show_usage();
 310         }
 311
 312         if (firstopt == 1) {
 313                 if (! recursive_action(".", TRUE, dereference, FALSE, fileAction,
 314                                         fileAction, NULL))
 315                         status = EXIT_FAILURE;
 316         } else {
 317                 for (i = 1; i < firstopt; i++) {
 318                         if (! recursive_action(argv[i], TRUE, dereference, FALSE, fileAction,
 319                                                 fileAction, NULL))
 320                                 status = EXIT_FAILURE;
 321                 }
 322         }
 323
 324         return status;
 325 }